You can only highlight text in PowerPoint directly if you have PowerPoint 2019 or subscribe to Microsoft Office 365.

PowerPoint 2007 has WordArt tools that let you generate text not only in a half-circle, but in all sorts of rings, waves, slants and fades so you can morph your words into whatever shape you envision.

In Microsoft PowerPoint, you can fill an area of a shape or text using the gradient fill in the Shape Format pane. Learn how!

To add alt text to images in PowerPoint, or edit an image's existing alt text, select the photo and choose "Edit Alt Text." ...